Anneli Tuulikki Jäätteenmäki (born 11 February 1955) is a Finnish politician who was the first female and 39th prime minister of Finland from 17 April 2003 to 24 June 2003.

She was elected as chairwoman of the Centre Party of Finland from 18 June 2000 to 5 October 2003, although the first year was as acting leader during Esko Aho's sabbatical leave to lecture at Harvard University.

Anneli Jäätteenmäki resigned on 18 June 2003, under pressure resulting from the accusation that she had lied to Parliament and the public over how she had acquired confidential Foreign Ministry documents which she used for political purposes during the election campaign.

As the elections turned out to be close, the defeated Social Democrats found reasons to suspect that her nontraditional campaign tactic was decisive in determining the outcome, which soured the relationship between the two major coalition partners.

The Parliament was not satisfied with her account, and once Manninen (the same afternoon) publicly claimed that Jäätteenmäki had specifically and forcefully asked for the information, and that he would be able to prove it, her coalition partners made it clear that they had no trust in her leadership.

The police investigation into the leak concluded, on 19 December 2003, that Jäätteenmäki should be prosecuted for aiding or abetting Manninen in revealing state secrets in contravention of the law.

In April 2006, Jäätteenmäki announced to the Finnish media that she was going to take some time out of her parliamentary work due to breast cancer, but she returned to politics following her successful recovery.